Environmental change may spur growth of ‘rock snot’

Controversial theory suggests alga is a native species, not an invader

BLIGHTED WATERWAYS  Explosions of rock snot, an algal bloom in rivers around the world, may be due to environmental changes, new research suggests.

B. Taylor

Environmental change could be triggering “rock snot” algal blooms that harm fish and leave pristine riverbeds looking like tattered mats of soggy toilet paper.